I am running SBS 2000 which includes Exchange 2000 Server together with ISA server 2000 as a package it works well, Suddenly all is not well my system seems to have been hijacked. When checking the server (because of a mail go slow) I discovered the SMTP virtual server Outbound queue full of SPAM (ie the standard "viagra", "get out of debt", "porn chick" stuff, addressed to aol, hotmail, and many others etc). After eliminating all other sources, ie scanning all PC's for viruses, disconnecting all workstations from the network,and the server from my adsl connection etc, I have discovered that the server seems to be creating the spam itself. This is based on the fact that the server is now totally disconnected from the network and the internet(ethernet cables unplugged), the queue has been deleted, and as soon as I restart the SMTP service, within a minute there are a 1000 email messages in the queue. I have double checked that my server is not acting as a third party relay,(and it is not) The Server Has all patches/latest updates/sbssp1/sp4 for wk2/sp3 for exch2k etc,etc I have run a thourough virus scan on the server, but found nothing. When I stop the SMTP service, the messages stop being generated, as soon as I start it again, the messages start being generated. Any idea's PLEASE !